The higher that expected noise margin in both directions would indicate poor line quality which is causing DLM (Dynamic Line Management) to reduce the connection speed.
Also, your connection time is only showing 1 days,12 Hours33 Mins04 Secs which would indicate the connection dropped recently, unless of course you restarted the home hub, which would make matters worse.
Do you have a phone connected to your line?
If you do, then dial 17070 and select option 2 (Quiet Line Test) and see if you can hear any noise between the announcements.
